Sheet-metal-strip-forming machine



'7 Sheets-Sheet 1 l m 'lml- J. M. FEDDERS SHEET METAL STRIP FORMING MACHINE Filed May 18 May 27, 1924.

m H DD 27 i J. M. FEDDERS SHEET METAL STRIP FORMING MACHINE Filed May 1&8, 1922 7 Sheets-Sheet 2 J. M. FEDDERS SHEET METAL STRIP FORMING MACHINE Filed May 18. 1922 7 Sheets-Sheet 3 k \whmw M? @W R. M 1 Qmi Q m% M,

A w HQ g May 27, 1924.

J. M. FEDDERS SHEET METAL STRIP FORMING MACHINE iled May 18 19 7 51188 t s-Shee t 4 Ma 27, 1924. I 1,495,637

J. M. FEDDERS SHEET METAL STRIP FORMING macmim Filed May 18. 1922 7 Sheets-Sheet s May 27. 1924. 1,495,637

J. M. FEDDERS SHEET METAL STRIP FORMING MACHINE Filed May 18. 1922 7 Sheets-Sheet? Fatent av 27, teat.

JOHN M. FEDDERS, 01F BUFFALO, NEW YORK, ASSIGNOR TO FEDDERS MANUFACTUR- A COORATIO'N OF NEW YORK.

" :L. 1 -METALSTRIP-FORMIN.G MAGNE- To all whom it may concern.

Be it known that 1, JOHN M. Farm at: a citizen of the United States, residing at Buffalo, in the county of Erie and State of New 5 York, hav invented new and useful Improvements in Sheet-Metal-Strip-Forming lachines, of which the following is a specification.

, This invention relates to a machine for forming strips of sheet metal for use in the manufacture of radiators whereby the water circulating around the heated parts of an explosion .engine is cooled.

The purpose of this invention is to produce a machine of this character whereby such strips may be manufactured expedltiously, accurately and economically.

In the accompanying drawings:

Figure 1 is a side elevation of the strip forming machine embodying my invention. Fig. 2 is a. horizontal section of the same, on an enlarged scale, taken on line 22, Fig. 1. Fig. 3 is a top plan view of the machine. Fig. 4 is a fragmentary vertical longitudinal section of the machine on the same scale shown in Fig. 2. Fig. 5 is a fragmentary longitudinal section on a still larger scale, showing the mechanism for punchin the holes in the strips and forming the radiating wings or fins thereon and rebending such wings or fins, these several parts of the machine being shown in their operative position and the section being taken on line 5-5, Fig. 15. Fig. '6 is a similar view of the 35 machine, taken on line 6-6, Fig. 15. Figs. 7 and 8 are vertical transverse sections taken online,78 Fig. 5. Fig. 7, showing the punching and wing forming dies in theixi open position and Fig. 8 in their closed position. Fig. 9 is a fragmentary sectional perspective view of the perforating and wing forming dies of the ress in a closed position. Fig. 10 is a similar view of these parts in an open position, and also showing a piece of finished material between the upper and lower sections of these dies. Fig. 11' is a vertical transverse section, on an enlarged scale. taken on line 11 11, Fig. 1. Fig. 12 is a fragmentary elevation of the Genevastop mechanism forming part of the strip feeding mechanism and showing the same in an operative position while the forming mechanism is at rest. Fig. 13 is a cross section. taken on line 13-43, Fig. 4'. Fig. 14

is a fragmentary vertical section, on an enlarged scale, taken on line let-14, Fig. 1, and showing the dies ofthe punching press in an open position. Fig. 15 is a similar view, but. showing the dies in a closed posi-. tion. Figs. 16 and 17 are vertical cross sections, taken on the correspondingly numbered lines in Fig. 1. Fig. '18 is a frag. mentary plan view of the periphery of one of the corrugating rolls. Fig. 19 is a fragmentary plan view of one of the dies of the wing punching and straightening press. Fig. 20 is a fragmentary section, on an enlarged scale, of the opposing portions of two corrugating rollers and a portion of a metal strip between the same. Fig. 21 is a perspective view of a metal strip, partof which is unfinished and other parts of which show successive steps of the operation there-. on of my improvedforming machine.

Similar characters of reference indicate corresponding parts throughout the several views.

At the right hand end of Fig.21 is represented a completed portion of the sheet metal strip which has been formed during the several operations of my improved form- "ing machine andas there shown, this strip has been bent so that the sz'ime is generally of zig-zag or wave-likeform and provided with a plurality of corrugations 31, the salient parts or summits '0 which project alternately from opposite sides of the strip and extend from one longitudinal edge there-- of to thelother. The summit'of each of the corrugations is provided at its opposite ends with flat, high faces 32, and the intermediate portion of each ofthese summits between its adjacent high faces is deprewed or bent reversely inward, so as to form longitudinal beads or grooves 33 in each of these summits which terminate short of opposite edges of the strip. The inclined walls of each corrugation are provided with a plurality of radiating wings or fins 34 which are bent outwardly from the stock of the strip, so as 100 to project laterally therefrom on the convex side of the respective corrugation. Each of these wings is attached at its base to the re-- snective corrugation adiacent to the summit thereof, while its free edge portion is partially cut and pushed from the respective wall, so as to form a erforation 35 therein where the metal for t e wing has been displaced therefrom. The several win s of the finished strip are arranged 'paral e1 with lid each other and with the length of the strip so as to permit of properly assembling the same with other strips which enter into the manufacture of the radiator.

In the manufacture of this strip, a main or stock strip 36' equal to twice the width of the regular or finished strip is preferably employed, which main strip is slit in two, lengthwise so as to produce two strips. An unbent portion of a regular strip equal to the width of the finished strip is represented at 37 in Figs. 2, 3 and 21. Each if these regular stripsof the proper width for the finished product is then operated upon by a pair of co-operating corrugating rollers which bend the strip so as to produce the corrugations 31, the high end faces 32 and the intermediate beads 33, as shown at 38 in Fig. 21. After being thus formed the strip is presented to the dies of a press which produce the wings as and perforations on the walls of these corrugations. so that these wings project at an angle and to an undue extent laterally from the con; vex sides of these corrugations, as shown at 39 in Figs. 10 and 21. Thereafter, the respective part of the strip is presented to the straightening dies of the press which operates to bendthe wings 34 from the position in which they are arranged at an angle to the length of the strip back to a position in which they are arranged parallel with the length of the strip, as shown at 30 in Figs. 5 and 21.

My improved. forming machine for making the above described radiator strip may be varied in its details of construction, but the preferred organization f the same. as shown in the drawings. is constructed as follows:

40 represents the main frame of the machine which may be of any suitable construc tion to support the several working parts of the machine. On the rear end of this frame is mounted a support for a roll 41 of strip metal which is of double width and from which the material is unwound and cut into two regular strips, each equal to half of the width of the main strip preparatory to being converted into a regular radiator strip. This supply roll of strip material is supported with its axis arranged horizontally and transversely relative to the general length of the machine. by a basket aving two upright longitudinal walls or side plates 42 and a plurality of horizontal transverse supporting rollers 43 which are arranged in a downwardly curved row be;- tween the side walls and each ivotally sup ported upon a pivot pin at w ich connects the side walls of the basket. The supply roll of strip material is free to rest with its underside on one or another of the supporting rollers of the basket and capable of turning and also moving bodily back and t eses? forth therein, so that the material of this roll may be unwound with a minimum of resistance from the periphery thereof and presented to the various devices which sub sequently operate thereon. Upon leaving the periphery of this roll, the double width strip first passes rearwardlyfupwardly and forwardly around the rearmost supporting roller of the basket, so that a slight tension is placed upon this strip material and thus revent the same from unwinding too freely rom the supply roll. From this tension roller of the basket the strip passes over the top of the supply roll and to the means whereby the double width strip of the supply roll is severed lengthwise into two regular strips each of which is equal to one half the width of main strip. lln its preferred form this slitting mechapism is constructed as follows:

45, 46 represent two'disk-shaped cutters which are arranged one above the other and have their pposing peripheral portions overlapping and extending across the path of the supply strip midway of the width thereof, so that during the forward mow:- ment of this'strip the opposing sharpened edges of these cutter disks will sever the main strip into two narrow strips by pulling the material of these strips forwardly ast these cutter disks. The lower cutter disk is mounted on a shaft 47' which is arranged horizontally and journaled transversely in suitable stationary bearings on the adjacent part of the main frame, while the upper cutter disk is mounted on a horizontal shaft 48 which is journaled transversely in bearings 49 which are capable of vertical adjustment to bring the two cutters into proper relation. As shown in the drawings, this adjustment is effected by means of springs 50 arranged between the underside of the bearings l9 and the adjacent part of the main frame, and adjusting screws 51 arranged in the upper part of the main frame and engaging with the top of the bearings 49, as best shown in Fig. 17. The strip material is guided to and beyond the slitting cutters by means which preferably comprise ,a lower guide plate 52 mounted on the adjacent part of the main frame and supporting-the underside of the strip material before and after the same is split. and two side guide bars 53 which aresecured to the bottom plate 52 and engage with the outer longitudinal edges of the strip material before and after the same is slit into and alsooverhang the outer longitudinal edge portions of the same for the purpose of confining the strip material in its proper place relative to the slitting cutters and the device which subsequently operate thereon. In order to avoid displace- .ment of the strip material immediately adtwo presser fingers 54, preferably of spring metal are provided which engage with two narrow strips of sheet metal on opposite sides of the cutter disks and are connected at their rear ends with a crossbar 154 secured to the adjacent longitudinal bars of the strip guide. The shaft 48 of the upper cutter is preferably provided at one end with a handle or knob 55 whereby the same may be turned manually and thus facilitate setting up the machine preparatory to starting the same.

After the main strip has been cut into two narrow regular strips of the proper width, these two regular strips are kept apart and prevented from overlapping at their inner longitudinal edges b a separating or spreading blade 56 which pro ects upwardly from the bottom late 52 between these two narrow stri s an holds the outer longitudinal edges o the same in engagement with the uide bars 53, as best shown in Figs. 2, 4 an 13.

After the two regular strips pass forwardly beyond the separating .lade 56, the same are simultaneously operated upon b a pair of corrugating and strip feeding rol ers 57, 58 between the opposing surfaces of which these strips pass forwardly and are,

corrugated thereby, so that each of these regular strips is provided with the mam corrugations 31, the flat high faces 32 and the beads 33 in the summits of these corrugations. For this purpose, each of these rollers is provided on its periphery with two sets of die faces arranged in an annular row, each of these sets being designed to co-operate with the companion set on the other roller for corrugating one of the regular strips, so that two regular strlps are corrugated at the same time. As best shown in Figs. 18 and 20, each annular set of (he faces of the rollers comprises transverse male corrugating members orribs 59 which (co-operate with female corrugating surfaces or grooves 60 in the opposing roller, and beading ribs or male members 61 arranged in the bottom of the corrugating grooves and engaging with female surfaces or recesses 62 at the summits of the corrugating ribs of the first mentioned roller. At the left hand side of Fig. 20 is shown a regular strip artl v uncorrugated and on the right si e of the same a part thereof which has been corrugated by means of this pair of rollers.

These corrugating rollers are caused to rotate in unison with each other by co-operaliou of the male and female die surfaces on the periphery thereof, which in effect produces an action similar-to that of two intermeshing gear wheels. The lower corrugating roller 57 is secured to a horizontal shaft 3 which is journaled transversely in suit: able bearings on the main frame while the upper corrugated roller 58 is mounted on a '77 on t the corrugated strips of material during which the walls of their corrugations are operated upon to produce the radiating wings or fins thereon and also to straighten the same after such formation. Although the motion for these corrugating rollers may be obtained from any suitable source and the intermittent action secured by anysuitable means, this motion is preferabl derived from the rotary crank shaft 68 o a punching and wing forming press and a Genevastop mechanism, as shown in the drawings. This crank shaft is journaled horizontally and lengthwise in a standard 168 rising from the main frame in front of the corrugating rollers and receives its motion at a reduced speed from a driving shaft 69 journaled on the rear part of the standard, by means of a gear pinion 70 secured to the driving shaft and meshing with a gear wheel 11 on one end ofthe crank shaft, said driving shaft being turned by means of a belt passing around a pulley 72 thereon or any other suitable means. On its opposite end the crank shaft of the press is provided with a disk 173 having a single Geneva-gear tooth 73 which is adapted to engage successively with a Geneva-stop wheel 74 having a plurality of notches 75 in its periphery which are engaged successively by the single geartooth 73 and thus cause the Geneva wheel'to be turned partially circumferentially during each complete turn of the Geneva gear. tooth. The crank shaft is provided wlth a locking disk 76 adjacent to the gear tooth 73 which is adapted to en age its periphery with successive locking aces 1e periphery of a locking disk 177 turning with the Geneva stop wheel and thereby prevent displacement of the latter and the parts associated therewith, while the stop wheel 74 is at rest. This stop wheel and its locking disk are journaled by means of a pin 78 on the adjacent part of the standard 168 and connected with a gear ate shaft. 80 and the shaft 63 of the lower corrugating roller 57 and a train of intermediate gear wheels 83, 84, 85, whereby mo tion is transmitted from the stop wheel 74: to the intern'iediate shaft, two of said inter mediate gear wheels being mounted on the adjacent standard and one of them being secured to the intermediate shaft 80, as

shown in Figs. 1, 2, 3 and 11.

The press containing the dies whereby the perforations and the radiating wings or fins are formed on theiwalls of the corrugations is arranged in front of the corrugating rollers so as to receive the corrugated strips of metal therefrom. In its general organization, this press comprises a stationary lower bed or table 86 upon which'the lower die of the press is mounted, and a vertically movable head 87 which carries the upper die and causes the latter to co-operate with the die of the bed or table.

This head is guided in ways 88 on the adjacent part of the standard 168 and is reciprocated vertically by means of a connecting rod 89 which is pivotally connected with the head and the crank shaft in any approved manner common to presses of this that the perforations and wingsare produced on two strips at the same time.

The perforating and wing forming die of one set on the bed comprises both male and female members which are adapted to cooperate with corresponding female and male members of the companion upper set on the head. so that when these two sets of companion dies are closed the corrugated part of the respective strip of metal between these dies will'be perforated in the walls of its corrugations and a plurality of d0wnwardly projecting inclined wings will be formed on the lower convex side of the lower corrugations and a plurality of upwardly projecting inclined radiating wings or fins will be formed on the convex upper side of the upper corrugations. The preferred form of the dies for producing these perforations and bending the metal displaced during the formation of these perforations so as to produce upwardly and downwardly inclined wings n the concave sides of the corrugations is as follows:

90 represents a base plate which is mounted on the upper side of the bed of the press and capable of a limited vertical movement relatively thereto and yieldingly held in its elevated position. For this purpose this lower base plate is guided on the bed by means of a plurality of vertical guide rods Losses? 1 91 which are secured to the underside of this base plate and slide in openings 92 in the bed, a stop or lifting plate 93 connecting with the lower ends of the guide rods and adapted to engage with the undeiside of the bed for limiting the upper movement of the base plate 90, a spring 94 en aging its upper end with the underside o the stop plate 93 and serving to yieldingly hold the base plate in its elevated position, a supporting plate 95 upon-which the lower end of the spring 94 rests, and upright supporting rods 96 connected at their lower ends with the supporting plate 95 while their upper ends are secured to the underside of the bed.

The lower die comprises a die plate 97 resting on the lower base plate 90 and provided on its upper side with a plurality of convex gripping faces 98 adapted to engage the lower concave sides of some of the beads on the strips and a plurality of concave gripping faces 198 adapted to engage the lower convex sidesot some of the beads on the strips, a plurality of lower longitudinal abutment bars 99 arranged in grooves 100 on the underside of the die plate 97 and provided with abutment lugs 101 projecting upwardly through openings 102 in the die plate 97 and terminating in convex V-shaped abutment faces 103 adapted to support some of said beads on their lower concave sides, springs 191 interposed between said bars 99 and the base plate 90 and adapted to yieldinglv hold said bars in an elevated position so that their faces 103 are flush with the faces 198, and a plurality of longitudinal punch bars 105 arranged in grooves 106 on the underside of the die plate 97 and each provided with a plurality of punches 107 which project upwardly through openings 108 in the plate 97 and are provided above the gripping faces 98 with concave V-laces 109. The upper die comprises a base late 110 secured against the underside ot the movable head of the press, a die plate 111 mounted on the base plate 110 and provided on its underside with a. plurality of convex gripping faces 112 adapted to en age the upper concave sides of some of the ends on the strips and a plurality of concave grip= ping faces 113 adapted to engage the upper concave sides of some of the beads of the strips, a pluralitypf upper longitudinal abutment bars 11 1 arranged in grooves 115 formed on the underside of the die plate 111 and provided with abutment lugs 116 projecting downwardly through openings 117 in the die plate 111 and terminating in convex V-shaped abutment faces 118 and adapted to support some of said beads on their upper concave sides, springs 119 interposed between the bars 114 and the upper base plate 119 and adapted to yieldingly hold thebars 114 in a depressed position, so that the faces 118 are flush with the concave faces 113, and a plurality of longitudinal punch bars 120 arranged ingrooves 121 in the upper side of the die plate 111 and each provided with a plurality of punches 122 which project downwardly through openings123 in the die plate 111 and are provided below the gripping faces 112 with concave V-faces 124.

When the press is open and its dies are separated, the lower abutment bars 99 are elevated by their springs 104, so that they bear against the upper sides of the grooves 100 and the upper'abutment bars 114 are depressed by their springs 119, so that they bear against the lower sides of the grooves 115, as shown in Figs. 10 and 14, Upon moving the head of the press downwardly toward the bed of the same, the beads of corrugations are first gripped between the abutments and punches of the upper and lower dies. During the continued downward movement of the head, the springs 104, 119 yield and permit the punches of the lower punch bars to enter the openings in which the upper abutment lugs are arranged and also permit the punches of the upper punch bars to enter the openings in which the lower abutment lugs are arranged, thereby pushing the upper abutment lugs upwardly and thelower abutment lugs downwardly in their respective openings and causing parts of the walls of some of the corrugations of the strip to be bent upwardly and others downwardly, as shown in Figs. 5, 6 and 9, to form the radiating wings 34. After'the two dies have come together sufiiciently to form the radiating wings, the concave gripping faces of each die engage with the companion convex gripping faces of the other die, as shown in Fig. 9, so that during the final portion of the closing action of the press, the upper and lower dies move downwardly together and exert a finishing pressure against those parts of the radiator strips between the respective dies during which movement the springs 94 are compressed. Upon opening the press, the upper and lower dies are first raised by the springs 94 until the stop plate 93 engages with the underside of the lower bed 86 and thereafter the dies .separate and the,abutment bars 99,114, are restored to their normal position by the springs 104, 119, thuscausing the strips with the punched wings thereon to be stripped from both dies so that the same are free to be advanced another step through the machine.

In order to assist in centering the corrugated strips of metal while the same are operated upon by the punching and wing forming dies of the press, strip centering sections 125, 126 are arranged on the bed and head of the press in rear of the punching and wing forming dies, said centering sections being provided with co-operating male and female die faces 127, 128 which correspond to the shape of the die faces on the periphery of the corrugatingrollers'excepting that they are arranged in parallel horizontal rows instead of circumferential rows. The faces of these centering dies engage with opposite sides of the strips and register with the corrugations thereof and hold the same firmly in place while the press is punching openings and forming radiating wings in the walls of the corrugations. The upper centering die is secured to the head but the lower centering die rests on springs 129, so that the same can yield-with the lower punching and wing forming dies and is limited in its upward movement by a stopscrew 130, as shown by dotted lines in Fig. 6, or by any other suitable means.

As the result of the punching operation, the radiating wings formed on the walls of the corrugations are arranged at an angle to the length of the strip and pro'ect laterally too far to permit of assem ling the same properly with other strips to form the air and water tubes of the core of a radiator. For the purpose of permitting such assemblage, it is necessary to straighten the wings so that they are parallel, or substantially so, with each other and the length of the strip. The dies for accomplishing this straightening effect on the wings are mounted in two pairs on the bed and head of the press in advance of the punching and wing forming dies. Each pair .of straightening. dies comprises a lower die 131 mounted on the bed and an upper die 132 mounted on the head and having co-operating male and female die faces 133, 134

which corresponds to the die faces on the corrugating rollers for producing the corrugations, beads andhigh faces on the strips of metal. The faces on the straightenin dies are arranged in horizontal paralle rows similar to the faces of the centering.

dies. In addition to these faces, the straightening dies are provided with longitudinal straightening grooves 135 each of which is arranged lengthwise in line with the punches which form a row of wings on .one side of the strip and which extends across the male and female portions of the respective die. The combined depth of a pair of companion straightening grooves in two opposing dies when the same are closed is less than the maximum thickness of the strip between the extremities of the radiating wings on opposite sides of the same after these wings have been produced on the walls of the corrugations by the punching and wing forming dies. When therefore a pair of straightening dies closes on a section of a strip having wings formed thereon at an angle to the length of the strip, these wings are bent backwardly or inwardly toward the body or longitudinal center of the strip by the bottom faces of the straightening grooves in the strai htening dies, these grooves being prefera ly of such a depth that the wings are bent inwardly until they are parallel with each other and with the length of the strip, as shown in Figs. 5 and 21.

While the two strips are passing lengthwise between the lower and upper dies of the press, the same/are retained in the proper position relative to each other by a plurality of central spreading guide blades 1%, 13?, mounted on the bed or table between the paths of the strips, and a plurality of side guide blades 138, 139, also arranged on sand bed or table and adapted to engage the outer longitudinal edges of said strips. 'lto permit the press to close without interfering with these guiding blades, the undersideof the upper die on the head is provided with grooves or recesses 140 to receive these blades, as shown in Figs. 7 and 8.

ln addition to feeding the strips of metal forwardly by means of the corrugating rollers, means are provided for positively pulling the same forwardly from the press and thus avoid any liability of slack or buckling in the strips which otherwise would interfere with the proper working of the machine. Means are therefore provided for this purpose which preferably CtOIIlPllSB lower and upper delivery or feeding off rollers 14:1, 142, which receive the advancing portions of the finished strips-of metal between them and positively pull or carry the same away from the press, this being accomplished by providing these rollers respectively at opposite ends with teeth 143, 14 1, which engage with the outer edge portions of the corrugations and on their central, parts with teeth 1 15, 14:6 which engage simu taneously with the inner edge portlons of the corruga tions of both strips, as shown in Fig. 16.. The lower feeding ofi' roller is mounted on on a horizontal shaft 147 which is journaled transversely in hearings on the main frame and is driven positively by a chain belt 148 passing with its turns around sprocket wheels 149, 150 on the shafts of the lower corrugating and feeding ofi rollers, while the intermediate parts of the stretches of this belt pass over guide rollers 151, 152 on the main frame, as shown in Figs. 1, 2, 3, t, 14 and 15. The upper feeding off roller is journaled on a horizontal shaft 153 which is mounted transversely on a vertically swinging yoke 154 which is pivoted at one end by a pin 155 to the main frame and provided at its opposite end with a handle 156 for mani ulating the same.

The upper feeding oil ro ler merely engages by gravity with the upper side of the cerrugated strips and is turned therehy and may be easily lifted to clear the path of the strips for convenience in getting the machine ready or inspecting and repairing the same.

'After the formed strips are delivered from the machine, the same are cut into suitable lengths by any approved means pre paratory to being assembled with other parts to form the water and air passages of a radiator.

In order to prevent the strip feeding mechanism from. overthrowing and getting the strip out of register with the dies of the press, a drag is applied to the strip feed mechanism which preferably consists of a split brake band 157 surrounding the hub of the lower corrugating roller and having its parts drawn together by a bolt 158 so as to frictionally grip this hub, and a bracket 159 connecting one end of the brake band with the adjacent part of the frame, as shown in Figs. 1 and 11.

Starting and stopping of the machine may be controlled by any suitable means, forinstance, by a clutch 160 on the crank shaft and a treadle 161 operatively connected with said clutch.

This machine permits of producing strips of the character described accurately with a minimum expenditure of power and time, and without liability of derangement of any of its parts, thereby reducing the cost of production accordingly.

ll claim as my invention:

1. A metal strip. forming machine, comprising means for supplying a wide strip of sheet metal, means for cutting said strip into a plurality of narrow strips, means for simultaneously forming said narrow strips, said cutting mechanism having two cooperating cutting disks which receive the wide strip between them, a guide for said strip adjacent to said cutting disks, separate shafts supporting said disks, fixed hearings in which one of said shafts is journaled, and adjustable hearings in which the other shaft is journaled.

2. A metal strip forming machine, comprising two dies which receive the strip of metal between them and which are movable toward and froln each other, each of said dies having male and female corrugating die surfaces which co-operate with corresponding female and male corrugating die surfaces on the other die for producing corrugations on said strip, and means associated with said corrugating die surfaces for deflecting parts of the walls of said corrugations to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openings and wings con'iprising abutments projecting through the. con-ligating die surfaces of one die, and punches projecting through the other die and engaging with said abutments.

3. A metal strip forming machine, comprising two dies which receive the strip of mama? metal between them and which are movable toward and from each other, each of said dies having male and female corrugating die surfaces which co-operate with corresponding female and male corrugating die surfaces on the other die for producing corrugations on said strip, means associated with said corrugating die surfaces for deflecting parts )1 the walls of said corrugations to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openings and wings comprising abutments projecting through the corrugating die surfaces of one die, punches projecting through the other die and engaging with said abutments, and means foryieldingly holding said abutments in a position inwhich they project beyond the face of the respective corrugating die surface.

r. A metal strip forming'machine, comprising two dies which receive the strip of metal between them and which are movable toward and from each other, each of said dies having male and female corrugating die surfaces which co-operate with corresponding female and male corrugating die surfaces on the other die for producingcorrugations on said strip, and means associated with said corr'ugating'die surfaces for deflecting parts of the walls of said corrugations to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openings and wings comprising abutments projecting through the corrugating die surfaces of each die. and punches projecting through the corrugatin surfaces of each die, the punches of one die l ieing adapted to co-operate with the abutments of the other die.

5. A metal strip forming machine, comprising two dies which receive the strip of metal between them and which are movable toward and from each other, each of said dies having male and female corrugating die surfaces which co-opcrate with corresponding female and male corrugating die surfaces on the other die for producing corrugations on said strip, vand 111621118;tlSSOCliltHl with said corrugating die surfaces for deflecting parts of the walls of said corrugations to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openings and wings conprising abutments projecting through the corrugating die surfaces of each die, and punches projecting through the corrugating surfaces of each die, the punches of one die being adapted to co-operate with the abutments of the other die, and springs for yieldingly holding said abutments in a position in which they project beyond the corrugating surfaces of the respective die.

6. A metal strip forming machine, comprising two dies which receive the strip of metal between them and which are movable toward and from each other, each of said dles having male and female corrugatn'ig die surfaces which cosoperate with corresponding female and male corrugating die surfaces on the other die for producing corrugations on said strip, and means associated with said corrugating die surfaces for defleeting parts of the walls of said corrugat1on s to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openings and wings comprising abutments projecting through the corrugating die surfaces of each die, punches projecting through the corrugating surfaces of each die. the punches of one die being adapted to co-operate with the abutments of the other die, each of said corrugating dies being provided below its face with grooves, bars arranged in said grooves and carrying said abutments, and springs for yieldingly moving said bars toward the faces of the respective dies.

7, A metal strip forming machine. comprising two dies which receive the strip of metal between them and which are movable toward andfrom each other. each of said dies having male and female corrugating die surfaces which co-operate -withcorresponding female and male corrugating die surfaces on the other die for producing corrugations on said strip, and means associated with said corrugating die surfaces for deflecting parts of the walls of said corrugations to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openingsand wings comprising abutments projecting through the corrugating die surfaces of each die, punches projecting through the corru gating surfaces of each die, the punches of one die being adapted to co-operate with the abutments of the other die, a bed upon which one of said dies is yieldingly supported, and a head supporting the other die and movable toward and from the die mounted on said bed;

8. A metal. strip forming machine, comprising two dies which receive the strip of metal between them and which are movable. toward and from each other, each of said dies having male and female corrugating die surfaces which co-operate with correspond ing female and male corrugating diecsurfaces on the other die for producing corrugations on said strip, and means associated with said corrugating die'surfaces for deflecting parts of the walls of said corrugations to form openings therein and wings projecting laterally from the edges of said openings, said means for forming openings and wings comprising abutments projecting through the corrugating die surfaces of each die. punches projecting through the corrugating surfaces of each die, the punches of one die being adapted to co-operate with the abutments of the other die, a bed provided vwith guide openings, guide rods connected with one of said dies and sliding in said guide openings, a lifting plate connected withsaid guide rods below the bed, a spring engaging one end with said lifting plate, a supporting plate engaging with the other end of said spring, supporting rods connecting said supporting plate with said bed, and a head movable toward and from said bed and supporting the other die.

9. A metal strip forming machine, comprising a pair of corrugating members which are adapted to receive a strip of metal between them and having co-operating die faces whereby said strip is corrugated, a pair of punching dies which receive said strip after it has been corrugated by said corrugating members and produce openings and wings therein, and centering dies which engage with the corrugated strip between the corrugating members and the punching dies and hold the strip in place while being operated on by the latter.

10. A. metal strip forming machine, comprising a pair of I corrugating members which are adapted to receive a strip of metal between them and having co-operating die faces whereby said strip is corrugated, a pair of punching dies which receive said strip after it has been corrugated by said corrugating members and produce openings and wingstherein, and strai htening dies which operate on said'strip after the wings are formed on the same and straighten said wings relatively to the length of the strip,

11, A metal strip forming machine, comprising a pair of corrugating members e ea? which are adapted to receive a strip of metal between them and having co-operating die faces whereby said strip is corrugated, a pair of punching dies which receive said strip after it has been corrugated by said corrugating members and produce openings and wings therein, and stra' htening dies which operate on said strip a ter the wings are formed on the same and straighten said wings relatively to the length of the strip, said straightening dies havlng co-operating male and female die surfaces which receive the corrugations of said strip and longitudinal grooves which receive said wings and are adapted to engage the bottoms with said wings and bend the same toward the body of the strip,

12. A, metal strip forming machine, com- I prising a press having a bed, a head mov able toward and from the bed, dies mounted on said bed and head and adapted to produce wings on a corrugated strip of metal, a pair of co-operating feeding and corrugating rollers arranged in the rear of said press and adapted to corrugate a strip of metal and push the same toward said press, a pair of delivery rollers arranged in front of said press and adapted to pull the strip of metal from said press, a power transmitting mechanism arranged between said press and feeding rollers and containing an intermittent stop mechanism, and means for operating said feeding and delivery rollers in unison including a belt passing around a belt wheel connected'with one of said feeding rollers and around a belt wheel connected with one of said deliver rollers.

JQHN M. F *DDERS 

